* master: (54 commits)
  updated geshi
  authpdo - use type safe comparison on passwords. fixes #1765
  removed unneeded files from random_compat
  Use cryptographically secure pseudo random number generator (CSPRNG)
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  or maybe I only now figured out the right travis config :-/
  disable 7.1 testing completely
  allow 7.1 failures until it's released #1682
  DE translation for key 'protected'
  Use 'Benachrichtigung' instead of 'Notifikation'
  Fix spelling of some terms (lower to upper case)
  DE translation for key: addUser_error_missing_pass
  DE translation for keys: update_name, update_mail
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  Implemented interwiki substitution for external images (issue #1614).
  ...

Uses paragonie/random_compat instead of insecure home-brewed code.

It's NEVER fine to fall back to mt_rand() for secure random.

Fixes #1760.

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inSQL password checking for authpdo

fix calculation of LastRevisionAt

added debug prints to better figure out when LDAP has search issues.

Return valid xml when XML-RPC interface not enabled

Implemented interwiki substitution for external images (issue #1614).

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currently phpseclib throws an error (about a deprecated function).
errors do not count as failures, so we can't skip them. so for now
7.1 testing is removed again.

DE translation for keys: update_name, update_mail

Usermanager/update lang de

DE translation for key 'protected'

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